Animation Nodes Combining lists generated after several loop iterations
Use &quot;reassign&quot; from the advanced settings:

Set the final list as parameter.
Select the loop node.
Go to the &quot;node&quot; tab, &quot;advanced node setting&quot;.
Check &quot;output&quot; to have the result as output.
Click on the &quot;reassign&quot; button: that will create an reassign output node that you can drag and place in the node tree.